Exhaust-regulator.



NQ M. LA PORTE.

EXHAUST REGULATOR. APPucATloN FILED ocr. 4. +915.

Patented July 4, M316.

2 SHEETS-SHEET l.

n N. NI. LA PORTE. EXHAUST REGULATOR. i APPLICATIoN FILED ocr. 4. 19H5. I 1,189,704. l Patented July 4, 1916.

` 2 SHEETS-SHEET Z.

NORBERT M.

EXHAUST-REGULATR.

y Lisavoa.

Application filed October 4, 1915.

a citizen of the United States of America,

vresiding in the city of Baltimore, State ofY Maryland, have invented certain new and useful Improvements in Exhaust-Regulators, of which the following is a specification. v A

`With thel exhaust operated cooling device described in my Patent No. 1,138,962, a slight difficulty may in some instances be encountered owing to .lack of pressure and velocity in the exhaust gases under low throttle conditions, as when the engine is idling. This would manifest itself by evidence of insufficient cooling when the engine is idling, and would be most apparent with motors having. a comparatively low proportion of radiator surface to piston displacement, for the heat generated under such circumstances, though sufficient to cause boiling if not properly dissipated, is slight compared to that generated under heavy loads and full throttle conditions. In order to overcome-this difficulty .due to lack of pressure in the exhaust `at low throttle which may cause a disproportionate decrease in the motive power derived from the exhaust and yutilized in cooling, I provide means which operates automatically to prevent decrease of exhaust pressure below a certain point. However, as an increase of the exhaust pressure at full throttle or under ordinary running conditions is ob]ec tionable, thisl device isso arranged that it has. no effect when the throttle is open and the car is running free or the engine is pulling hard, as on an up-grade or in heavy going.

In the form of the invention illustrated, the device consists of a valve in the exhaust pipe, mounted on an eccentric pivot and weighted or otherwise controlled so that it tends toclose or diminish the opening at low pressures 'or low throttle, but swings freelyopen so that its effect is negligible at increased pressures and velocities as when the throttle is open to the full or at medium throttle opening as when the car is running free.-

In -the accompanying drawings I have illustrated so much of an automobile engine provided with an exhaust operated cooling system in connection with my check, as isv necessary to a full understanding of my invention.

Specification of Letters Patent. I

LA PORTE, OF BALTIMORE, MARYLAND.

Patented July a, une, seri/a1 No. 54,034. y i

Figure 1 is an elevationillustrating the entirecooling system, exhaust manifold and outlet; Fig. 2 is a detail view of the muler and exhaust pipe beyond the muffler; Fig. 3 is an illustration ofan exhaust check valve of one type; Fig. 4 is la similar illustration of another valve slightly different as to its details; Fig. 5 shows another form of exhaust pressure regulating valve; and `ig. 6 is a detail view showing a portion of the gas tube and non-return'check valve.

Referring to the drawing I haveshown in Fig. 1 an engine casting 1, radiator 2, top and bottomconnecti'onsl 3 and 4 from the water jacket to the radiator, an exhaust circulator 5 ofl 'the type de# scribed in my Patent No. 1,138,962, consisting of a nozzle 6 in the bottom yradiator connection and a pipe 7 leading from the exhaust manifold 8 to the nozzle 6. era'bly, there is a non-return check valve 9 in the pipe 7. .v f

The circulator as shown is operative under all conditions, but at very low throttle the circulatingvefl'ect is less than is `found necessary in some installations, and to overcome this difficulty, an exhaust regulating or check valve 10 has been provided in the exhaust pipe 11.

In the form of the invention shown in Figs. 1 to 3, the exhaust regulating valve 10 of the butterfly type, is mounted'on an eccentric transverse pivot 12 so that when the pressure and velocity of the exhaust areV sufficient, the valve is thrown wide open and held in that position so that 4it has practically no effect on the exhaust pressure, but when the throttle is closed and the volume of the exhaust gases is so decreased that the ressure and--velocity are reduced, the effect vof the regulating valve becomes noticeable as it tends to close and imposes on the exhaust a -pressure correspending to this tendby numerals ;I

shown a weight 13 af-v the lower side which having an arm y17 on the valve pivot land a s spring 18 connected to the end of the arm and tending to close the valve. p l i The operation is believedto be apparent from the description taken ,in connection i `Witli the preamble and the drawings. The object of the device is kto regulate the exhaust pressure Whenthe throttle is practically closed and the engine is idling or the car is running down-hill. Under these circumstances, the tendency of the valve to close imparts a corresponding pressure to the exhaust but the valve is so mounted that it is held Wide open by the velocity of the exhaust under conditions of normal or lfull and intermediate throttle and has no appi'ec'iable effect on the exhaust or back pressure, yfor it will of course beapparent that while an increase of back pressure may be important at full or intermediate throttle positions, the increase of back pressure at low throttle is so slight as to have no harmful eifect on the operation of theiengine.

I have thus described various embodiments of my yinvention specifically and in 'detail in order that its nature and operationv may be fully understood; -hoivever thespecific terms herein are used in their descrip,- tive rather than in their limiting'sense and .the scope of the invention is defined in the claims. .1

, 1. In an internal combustion engine, a .cooling system including a radiator, a Water jacket and suitable connections,'a circulating deviceoperated lby the exhaust having a tube leading a portion of the exhaust gases from the exhaust pipe or manifold to supply the circulator, and means for regulating the exhaust pressure consisting of a valve in the exhaust pipe beyond the tube, the valve being mounted to open freely in response to exhaust pressure.

2. In an internal combustion engine, a. cooling system including a Water jacket, a

radiator andl a. circulating device operated by the exhaust, means for regulating the exhaust pressure at low throttle positions in the form ofa valve in the exhaust pipe opening in the direction of and in response to the exhaust pressure, and means tending to close the valve against slight pressures.

3. In a cooling system for internal corn- ,creased exhaust pressures.

lthis 24th day of September 1915.

bustion engines consisting of a Water jacket, a radiator and av circulating device'operated by the exhaust, means for regulating the exhaust at low throttle positions `in the'form of a valve in the exhaust pipe, and an eccentrically placed pivot on which the valve is mounted to` swing open in thedirection of the exhaust current, the valve having a slight tendency to rotate about its pivot to` closed position.

4. An internalcombustion engine having a cooling system consisting of a Waterl jacket, a radiator, a circulating device in the of a nozzle in the circulating system, means connecting the nozzle to the exhaust pipe, means for regulating the exhaust pressure consisting of a valve' in the beyond'the pipe leading to the nozzle, the valve being pivotally mounted so that in open position ythe passage issubstaiitially unobstructed. and means giving the said valve a' slight tendency to close so that it rey sists and thus increases slight exhaust pressures but opens freely inA response to in-y 6. In an internal' combustion engine, al

Water cooling system including a radiator, a

water jacket, connections arranged to give system turned in the direction of ycirculation, means connecting the nozzle to the exhaust pipe beyond the pipe leading tothe l nozzle, and means tending to close the valve against slight exhaust pressures permitting -tlie valve to openfreely in response to excessive exhaust pressure.

Signed by me at Baltimore, Maryland,

` NORBERT M. LA PORTE.

equa a: this patent may i qbtainea :tr-1mk cents each, by laddressing mfcanmmoner c: Imm, .wnmnmn o."

exhaust pipey thermosiphonic circulation, a circulating de v vice consisting of a nozzle in the circulating ina 

